Description:Cage Nuts used for quick assembly in blind or center-panel locations,as mounting servers, rack shelves, switches, routers, and other networking, electronic, and data equipment.Specification:Material: Carbon Steel Finish: Black ZincThread Size: M4 x 0.7mmTotal Size: 13 x 12.5 x 9mm/0.51 x 0.49 x 0.35inch (L*W*H)Package Content: 50Pcs x Cage Nuts